Sildenafil is used for the treatment of erectile dysfunction and pulmonary arterial hypertension. It is sold under the brand name of Viagra. Sildenafil inhibits an enzyme cGMP-specific phosphodiesterase type 5 that promotes degradation of cGMP, which regulates blood flow in the penis.Reference standards of Sildenafil API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
Sildenafil
Catalogue No.:PA 19 08000
CAS :
Molecular Formula : C22H30N6O4S
Molecular Weight : 474.58
O-Desethyl-O-propyl Methisosildenafil-d4
Catalogue No.:PA STI 027470
Molecular Formula : C24H30D4N6O4S
Molecular Weight : 506.65
Descarbonsildenafil-d6
Catalogue No.:PA STI 027480
Molecular Formula : C21H24D6N6O4S
Molecular Weight : 468.60
Desethyl Sildenafil-d3
Catalogue No.:PA STI 027500
Molecular Formula : C20H23D3N6O4S
Molecular Weight : 449.52
N-Desmethyl Sildenafil-d8
Catalogue No.:PA STI 028620
Molecular Formula : C21H20D8N6O4S
N-Desmethyl-N-benzyl Sildenafil-d5
Catalogue No.:PA STI 028630
Molecular Formula : C28H29D5N6O4S
Molecular Weight : 555.70
Desmethyl Thiosildenafil-d8
Catalogue No.:PA STI 028770
Molecular Formula : C21H20D8N6O3S2
Molecular Weight : 484.66
Homo Sildenafil-d5
Catalogue No.:PA STI 046860
Molecular Formula : C23H27D5N6O4S
Molecular Weight : 493.63
Iso Sildenafil-d3
Catalogue No.:PA STI 054300
Molecular Formula : C22H27D3N6O4S
Molecular Weight : 477.59
Methisosildenafil-d4
Catalogue No.:PA STI 058600
Molecular Formula : C23H28D4N6O4S
Molecular Weight : 492.63
Piperazonifil-d5
Catalogue No.:PA STI 073900
Molecular Formula : C25H29D5N6O4
Molecular Weight : 487.61
Propoxyphenyl-thiosildenafil-d8
Catalogue No.:PA STI 075440
Molecular Formula : C23H24D8N6O3S2
Molecular Weight : 512.72
Pyrazole N-Demethyl Sildenafil-d3
Catalogue No.:PA STI 076040
Molecular Formula : C21H25D3N6O4S
Molecular Weight : 463.57
Sildenafil-d3
Catalogue No.:PA STI 079220
Molecular Weight : 477.60
Sildenafil-d8
Catalogue No.:PA STI 079230
Molecular Formula : C22H22D8N6O4S
Molecular Weight : 482.63
Thiosildenafil-d3
Catalogue No.:PA STI 082870
Molecular Formula : C22H27D3N6O3S2
Molecular Weight : 493.66
4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonyl Chloride
Catalogue No.:PAI 19 012010
Molecular Formula : C17H19ClN4O4S
Molecular Weight : 410.87
Sildenafil citrate (Y0001578)
Catalogue No.:PA EPY0001578
Molecular Formula : NA
Molecular Weight : NA
Sildenafil impurity A (Y0001579)
Catalogue No.:PA EPY0001579
Catalogue No.:PAI 19 012020
Molecular Formula : C9H14O4
Molecular Weight : 186.21
Catalogue No.:PAI 19 012030
Molecular Formula : C10H16N2O2
Molecular Weight : 196.25
Catalogue No.:PAI 19 012040
Molecular Formula : C8H12N2O2
Molecular Weight : 168.20
Catalogue No.:PAI 19 012050
Molecular Formula : C8H11N3O4
Molecular Weight : 213.19
Catalogue No.:PAI 19 012060
Molecular Formula : C8H12N4O3
Molecular Weight : 212.21
5-(2-Ethoxyphenyl)-2-methyl-3-propyl-2,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
Catalogue No.:PAI 19 012070
Molecular Formula : C17H20N4O2
Molecular Weight : 312.37
2-(Benzyl(1-(4-methoxyphenyl)propan-2-yl)amino)-1-(4-(benzyloxy)-3-nitrophenyl)ethan-1-one
Catalogue No.:PAI 19 012080
Molecular Formula : C32H32N2O5
Molecular Weight : 524.62
4-[[2-Ethoxy-5-[(4-methyl-1-piperazinyl)- sulfonyl]benzoyl]amino]-1-methyl-3-propyl- 1H-pyrazole-5-carboxamide
Catalogue No.:PA 19 0081000
Molecular Formula : C22H32N6O5S
Molecular Weight : 492.6
3-Isobutyl-1-methyl-4-nitro-1H-pyrazole-5-carboxylic acid
Catalogue No.:PA 19 0081001
Molecular Formula : C9H13N3O4
Molecular Weight : 227.22
5-(2-Ethoxyphenyl)-3-isobutyl-1-methyl-1,4-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
Catalogue No.:PA 19 0081002
Molecular Formula : C18H22N4O2
Molecular Weight : 326.4
3-Isobutyl-1-methyl-4-nitro-1H-pyrazole-5-carboxamide
Catalogue No.:PA 19 0081003
Molecular Formula : C9H14N4O3
Molecular Weight : 226.24
2-(2-Ethoxyphenyl)-5-methyl-7-propyl-3,5-dihydro-4H-pyrrolo[3,4-d]pyrimidin-4-one
Catalogue No.:PA 19 0081004
Molecular Formula : C18H21N3O2
Molecular Weight : 311.39
5-(2-Ethoxy-5-((4-methylpiperazin-1-yl)sulfonyl)phenyl)-1-methyl-6-nitroso-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
Catalogue No.:PA 19 0081005
Molecular Formula : C22H29N7O5S
Molecular Weight : 503.58
5-(2-Ethoxy-5-((4-nitrosopiperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
Catalogue No.:PA 19 0081006
Molecular Formula : C21H27N7O5S
Molecular Weight : 489.55
Propoxy phenylthio Aildenafil
Catalogue No.:PA 19 0081007
Molecular Formula : C24H34N6O3S2
Molecular Weight : 518.7
Oxohongdenafil
Catalogue No.:PA 19 0081008
Molecular Formula : C25H32N6O4
Molecular Weight : 480.57
Mirodenafil
Catalogue No.:PA 19 0081009
Molecular Formula : C26H37N5O5S
Molecular Weight : 531.67
Mutaprodenafil
Catalogue No.:PA 19 0081010
Molecular Formula : C27H35N9O5S2
Molecular Weight : 629.76
Thiosildenafil
Catalogue No.:PA 19 0081011
Molecular Formula : C22H30N6O3S2
Molecular Weight : 490.64
Nitrodenafil
Catalogue No.:PA 19 0081012
Molecular Formula : C17H19N5O4
Molecular Weight : 357.37
Norneosildenafil
Catalogue No.:PA 19 0081013
Molecular Formula : C22H29N5O4S
Molecular Weight : 459.57
Dimethylsildenafil
Catalogue No.:PA 19 0081014
Molecular Formula : C23H32N6O4S
Molecular Weight : 488.61
Gendenafil
Catalogue No.:PA 19 0081015
Molecular Formula : C19H22N4O3
Molecular Weight : 354.41
Thioquinapiperifil Dihydrochloride
Catalogue No.:PA 19 0081016
Molecular Formula : C24H30Cl2N6OS
Molecular Weight : 521.51
Dithiodesmethylcarbodenafil
Catalogue No.:PA 19 0081017
Molecular Formula : C23H30N6OS2
Molecular Weight : 470.65
Hydroxythiohomosildenafil
Catalogue No.:PA 19 0081018
Molecular Formula : C23H32N6O4S2
Molecular Weight : 520.67
Benzyl Sildenafil
Catalogue No.:PA 19 0081019
Molecular Formula : C28H34N6O4S
Molecular Weight : 550.68
Sildenafil-d3 Citrate Salt
Catalogue No.:PA STI 089539
Molecular Formula : C28H35D3N6O11S
Molecular Weight : 669.72
Desmethylcarbodenafil
Catalogue No.:PA 19 0081020
Molecular Formula : C23H30N6O3
Molecular Weight : 438.53
Thiohomosildenafil
Catalogue No.:PA 19 0081021
Molecular Formula : C23H32N6O3S2
Molecular Weight : 504.67
Sulfoaildenafil
Catalogue No.:PA 19 0081022
Carbodenafil
Catalogue No.:PA 19 0081023
Molecular Formula : C24H32N6O3
Molecular Weight : 452.56
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